Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
BUILD… THE LAKE!
It has long been observed that the water surface effect on people calming. It is very valuable in our troubled time, when the human nervous system is subjected to constant emotional...
FLEX SHAFT + CANDLE
During the occupation of technical creativity in the home workshop, where a power drill with various bits are often the main instrument, can be very helpful homemade device with a...
